I've just come across a new issue on my AQ running the stable release r224.
I'm using a Taranis radio with X8R receiver in 16ch mode connected via s.bus with an inverter, and it works fine (shows radio quality 100%), until any parameter is written to rom, then the radio quality goes to 0%, and the radio doesn't work again until the AQ is power cycled. This could be dangerous if any parameters are changed during flight. This issue happens whether the params are changed via QGC, or via the android app.
Previously I have been running this same AQ board with a D8R-II receiver connected via PPM for a few months without issues.
I also have another AQ board running R224 with an X8R receiver connected via s.bus, but it's only in 8ch mode, and is bound to a FRSKY DJT module on a Turnigy 9x. This setup uses the same inverter, and doesn't lose the radio link when parameters are written. Next step will be to try binding this receiver to the Taranis in 16ch mode and see if the issue also appears.
I've just done some more testing on this first AQ which is having issues, and sometimes writing to rom will just cause a drop in radio quality to 90%, and then it will come back and keep working, and other times it will drop it to 0. Also if I keep writing parameters to rom when the radio quality shows as 0, it will sometimes come back to 100%.
I have of this last test if anyone is interested. Is anyone running an X8R via s.bus in 16ch mode with R224 who is able to replicate this?